Electric water-heater.



R. P. BARNSTEAD.

ELECTRIC WATER HEATER.

APPLlcATloN man 1AN.27 1913.

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Patented June 15, 1915.

R. P. BARNSTEAD. ELECTRIC WATER HEATER. APPLICATION Hup/11m17.191s.

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Specification of Letters Patent. Patented June 159 ,1915;

Appiicatidnmea January 27', 191s. 'serial Nnjnaaai.

To al? wiz omit 'may concern Be it known that I, ROBERT-?. BRNs'rnnn, a citizen ofthe United States, and residing at. Boston, in the Ac olm'ty ofzSuolk and Co-1nlowing is a full and exact description.

' This invention relates primarily to appatains first to' improvedmeans. for enabling the Water to be Ievaporated by electric heating cells, fand, second,` to certain improvelments in details of'"construction hereinafter set forth.

of'this specification, Figurel is a central ytion of theV sameon the line X-X, Fig. 3

is' a. central'vertical sectiognfof 'one ofthe cell-supporting.sockets. Fig. 4 is an under view off'the' same.l

As s'hovvn'in Fig.l 1,--the electric heater cells 41 are 'supported Within the evaporatfing chamber 2,: from -vvhich the vapor passes up 'through the channel 3. to the. condensing 'water for cooling the "condensing chamber -v enters the cooling chamber G'through a suit- .chamber 4.; thewater'ofcondensation issuing. from the latter through the pipe 5,. The

able 4supply .7', land the heated yoverflow escapes through the pipe 9 to the Water jacket 10.- From the -Water'jacket, the Water overfiows through the nozzle 11 to the tube 412 'which communicates at its lower. end

through a connection 13 and 14: -to the evaporating chamber. Any eXcessjo Water' overiows through'the pipe 15 to the drain,

and so prevents thel v vater in the evapora-ting chamber from rising above the predeterf mined level. By havingthe'overow from j the cooling chamber pass through the Water jacket previous toits admissionto the evaporating chamber, the Water is brought nearly to the' boilingv point before such admission,

. and the amount of heat 'required for its Prior to my invention, the overbvv from the evaporation is correspondingly reduced.

cooling chamber passed directly to the tube 12 and thence-to the evaporating chamber.

It has heretofore been the Vcustom to insert the heater cells 'or units'within a small-cylinder. The great -diiiculty' .with such an Referringv to the drawings. forming part vai-rangement`l Was-that the `Water being ini lContact;with the outer surface. of the cylinder or shell, 'andthe heat from the heater A unit havin to ass both throu h th th' kmonivealthI of Massachusetts, have invented) i g p g e 1c ness-of such shell'fand also through an ail space Vbetween the shell and unit, a considerable Waste of electriccurrent Was entailed y for' the desired amount of evaporation.` 'By means of my 11nprovement,.l have reduced such current .to a minimum. To dothis, the

Hoor 16 of the' evaporatingifchamber is formed Withseveral -internally threaded holes 17, as shown in Figs. land 2, adapted to receive. the correspondingly threaded sockets 19, Which are each formed with an overhanging shoulder 20 ground to lt Watertrght up against-the under surface of said floor. In the upper lpart ofeach socket is -solde'rcdthe lower. end of a heater unit 1,

as shown in Fig. 3, the distance of the units Within the sockets being only just enough 'for strong and water-tight soldering. To make ample room i for attaching .the lead Wires -to the'terminals`21, 22, the lower inner l surface o f Aeach socket is chamfered awayv sald terminals' being connected through suitable Wires 2 3,- 24; with l'a current-source 25.

lThe periphery of each socket being made polygonal, as shown in 'Fig. .4f, the same can be easily unscrewed or returned-the Water' being, of course, first drawn ofi' through the cock 26. Practically the entire outer surface of each' heater unit is presented to the Water, so that the ,Warmth therefrom performs its desired task With the least possible delay andwaste. Additional to the advantages aboverecited for the Water jacket arethese It savesthe heat otherwise dissipated from the surface of the chamber 2, and, finally, it

'prevents the still from getting burned out;

for its'ometimes happens that the current to the heater units is not turned o Whenv thefWater supply ,to the `cooler chamber 6 is shut off. Consequently after a' time the ennected metal partsito a temperature which melts ythe lsolder yholding them together.

But,- by using the'water jacket, from which the Water can b e'but slightly evaporatedfthe by thev Water toa safe degree.

What I- claim as my invention and for temperature of said metal parts is held down ha'ving a bottom formed with a threaded hole, of an electricv heater unit having te-rminals at one end, and4 a'n 'annular socket receiving and supporting the lend of said heater unit, said socket being formed with a shoulder of considerably vgreater diameter than the remaining portions thereof, said remaining portions being externally threaded to screw into said threaded hole, said shoulder being peripherally olygonal and internally conical, Where y said shoulder serves both as a means for forcibly screwing the socket into said hole, and as a Wall to.

protect said"`terminals.

ROBERT P BARNSTEAD.

Witnesses:

A. B. UPHAM, R. W. FROST. 

